James e



(Nomodei.)

J. R. GLADNEY 8: J. C. MAYFIELD.

PLOW.

No. 492,283. Patented Feb. 21, 1893.

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UNITED STATES PATENT OFFICE.

JAMES GLADNEY AND JAMES C. MAYFIELD, OF ROANOKE, ALABAMA.

PLOW.

SPECIFICATION forming part of Letters Patent N0. 492,283, dated February21, 1893.

Application filed July 5, 1892. Serial No. 439,077. (No model.)

To @ZZ whom it may concern:

Be it known that we, JAMES R. GLADNEY and JAMES C. MAYEIELD, citizens ofthe United States, residing at Roanoke, in the county of Randolph andState of Alabama, have invented certain new and useful Improvements inPlows; and we do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

Our invention relates to certain new and useful improvements in plows.

It has for its objects to facilitate the application of the point to thestandard inorder that said points may be readily replaced when worn out,or that points of varying sizes or shapes may be substituted one for theother and securely fastened in place. And with these ends and objects inview our invention consists in forming in the body or standard of theplow, preferably near the top, a hole or orice to receive a suitablebolt by means of which a slotted sliding plate may be secured in anydesired position by means of a clamping nut on the bolt, and in alsoproviding said body or standard at a point a suitable distance below theupper end with a T-shaped slot, the lower or narrow portion of said slotbeing beveled rearward so that a compound square and dovetail bolt orrivet can be secured therein, and securing to the body or standard theplow point through the medium of the compound rivet and sliding plateall as will be hereinafter more fully set forth and specificallyclaimed.

In order that those skilled in the art may know how to make and use ourinvention we will proceed to describe its construction and advantagesreferring by letters to the accompanying drawings, in which- Figure l isa view slightly in perspective of a plow point secured in place inaccordance with our invention. Fig. 2 is a central longitudinal section.Fig. 3 is a partial rear View, taken at the line of Fig. l, of the bodyor standard and point secured in proper relation to each other. Fig. 4.is a cross section taken at the line y, y, Fig. 2, with the compoundrivet removed. Fig. 5 is a similar section t-aken at the same point butshowing the rivet in position. Fig. 6 is aview slightly in perspectiveof the body or standard of the plow, with the point and sliding plateremoved; and Fig. 7 is a perspective view of a modification in which themold board is provided with an extension to serve the purpose of thesliding plate.

Similar letters of reference denote like parts in the several figures ofthe drawings.

A represents the standard or body of the plow, or a suitable platesecured thereto as :may be thought desirable. At asuitable locality onsaid body or plate is formed aT- shaped slot B having the narrow portionof said slot beveled rearwardly to meet and form .a continuance of thelarger portion of the slot at the rear.

C is a plow point of any desired construction or form, and provided nearthe upper end witha square hole or slot to receive the square portion ofthe shank of a fastening rivet D. The rivet D is made of the form shownmost clearly at Fig. 5, and is composed of a head, a square shank equalin length to the thickness of the plow point, and then of dovetail formto an extent sufficient to firmly interlock with the faces of thebeveled portion of the T-slot B.

E is a sliding locking plate formed with a longitudinal slot F throughwhich passes a bolt G which also passes through a hole H (see Fig. 6) inthe body of the plow, and. by means of which the plate E is securedrigidly in any suitable position, through the medium of a hand nut I.

When it is desired to secure a point in place, the compound rivet D ispassed through the square hole, adapted to receive it, in the plowpoint, the dove-tail end of said rivet is then passed into the upper orhead portion of the T-slot B, in the body or standard A, when the pointis then forced downward so that the dove-tail end of the rivet willfirmly interlock with the beveled or narrow portion of slot B, thusiirmly connecting the point and standard. In Order that the relationthus secured between the plow point and standard may be maintained, thesliding plate E is now placed on the standard and the bolt Gr put inplace, the plate E is then forced downwardly until its lower straightedge is in close contact with ICO the upper straight edge of the plowpoint, and the plate E is then rigidly secured in place tightening thehand nut I.

The adj ustability of the sliding plate E permits it to be adapted toall ordinary Variations of castings and also permits of compensation forwear resulting from friction and use.

When thought desirable the mold board of the plow may be constructedwith a lateral projection as shown in Fig. '7, and such eX- tension maybe employed to subserve the same purpose as the sliding plate E.

By our invention it will be readily seen that plow points may be readilyand expeditiously changed and interchanged in the field Without the useof tools o1 the necessary presence of a skilled mechanic. Slightvariations may of course be made in the details of con- JAMES R.GLADNEY. JAMES C. MAYFIELD.

Witnesses:

J. S. TALLEY, YOUNG BLAKE.

